Signaling device



Sept. 28, 1937. J, M, AUFIERO 2,094,422

SIGNALING DEVICE Filed Oct. 5, 1934 54 58 INVENTOR.

JOHN M AuF/E/PO, BY

A TTORNEYS.

Patented Sept. 28, 1937 SIGNALING DEVICE John 'Aufiero, Brooklyn. N. Y., assignor to a E. A. Laboratories, Inc., Brooklyn, N. Y., a corporation *ofwNew York Application October 3, 1934, S erialNo. 746,636

Olaimsr (01. 116138) and capable of manufacture by quantity produc- I tion methods, these parts being extremely compact and capable of assemblage by relatively unskilled labor, and, when assembled, permitting ofrapid adjustment-should adjustment be desire.d'andoperating over long periods of time with freedom from all difliculties. 7

With these and other objects in mind; reference' is had to the attached sheet of drawings illustrating one preferred form of the invention,

and in which- Fig. l'isaa planview'of a sounding'device or unit constructed in accordancewith the present invention;

Fig.2 is a rear view'thereof with certain of" the stru'ction; and. 7

Fig.3 is a transverse sectional view taken along parts removed'to disclose the underlying conthe lines 3-'-3 and in thedirectionof the arrows as indicated in Fig. 2.

While the teachings of the present invention are ing device, it is'oneof the primary "features of this 'invention'to produce a desirable device of this character; andin which theparts may large- 1y be'manufactured' byqdie casting or othersuitable quantity production methods.

- not necessarily restricted to a'multit'one sound-' Thus thenumerals "5 and '6 indicate. trumpet-- portions which-havea common base plate I and are connected by a brace portion 8. All of these parts preferably form integrally connected porshownin'dotted' lines'in Fig."2, the base! hasat a point intermediate theaxesof trumpets'fi and 6 a notch' or depressed portionythe purpose 'of' which will be hereinafter brought out.

Positioned to the rear of the base I is acasing 9 which may also be diecast'. This casing prefertions which are produced simultaneously. As

ably includes a side wall of an'area equal to the base- I and has a pair of similar internal flange or: partitioniportions 10,- each ofwhich has an opening. II in axial alignment. withone of. the

trumpet portions when the casing is applied. to the base 1. 'Ihus,.there is provided to the rear of each partition [0 a chamber I2. The casing 9 is also formed witha tubular portion l3 which lies substantially withinthe area of the casing base and the notched portion heretofore described as being shown in dotted lines in Fig. 2. The tubular portion may be divided into separate compartments by means of a flange l4, and rearwardly. of this flange access to the interior of the. tube is afforded by means of an angularly extend ing nipple l5, which maybe internally threaded. The openings I6 may also be formed at the time of manufacture of thecasing portion 9, and these latter openings communicate respectively with the interiorof the bore of the tube l 3 and the two chambers 12.

The rear face of the casing is closed as, for example, by a pair of separate caps l1, and with a view to maintaining the parts in assembled condition,.bolts l8 are preferably employed and extend through openings in. the caps I! through bored bosses or columns l9 formed integrally with the casings-and into screw-threaded recesses or openings in the base I.

It. will be observed that the partition members l0 have each-chamber preferably terminating in a plane inwardly of therear edge of the casing 9. Inthis mannerseats. are provided for dia-- phragms 20, so that. the latter lie within the area of the casing 9. Also the caps. I! may have. their edge portions reduced as at 2|, sothat they in turn may extend into this space and, as shown in Fig.3, provide what in effect isanair-tight seal.

The openings of the partition members l0 are preferably defined by forwardly extendingtflanges 22, which. flanges have an area'substantially less than the base portions or bores 23 .of the trumpets 5 and 6; Inthis manner there are provided what might be termed valve seatswhich are engaged by valves, preferably includingbodies each formed of a pair-of superposed disks 24 of different diameters and of which the. outermost is preferably the smallest. to thus someWhat-rigidi: fy the innermost, which-forms the valve proper. The mounting of these valves is secured by havingthem centrally apertured and disposed upon a. common stem 25, which may have its outer end-headed as at 26 to prevent accidental detachment of the parts. Washers 21 may be disposed above and below the valve bodies not alone to prevent any possibility of chattering, but also. tomaintain the central portionsofflthe valve bodies substantially rigid. The diaphragms; 20

are each formed with a. central opening preferably mounting nuts 28 with which washers 29 and resonators 30 may be associated. The shanks of the stems 25 are preferably each screw-threaded as at 3| so as to engage the threads of the nut, and a lock nut 32 may, in each instance, be employed to lock the stems against movement with respect to the diaphragms.

In this manner an adjustment is provided in that each of the diaphragms embodies a certain inherent resiliency which, with the parts set up in the manner afore noted, serves to maintain the valves normally in seated condition upon their seats. ably has applied to it a removable .casing or 010-. sure element 33' which, upon removal, permits access to the nut 32. Consequently, an operator may adjust the degree of intimacy with which the respective valves normally engage their seats.

Disposed within the tube l3 is a valve member which again is preferably formed of a single piece of stock, and which may include a plug body 33rhaving a reduced end portion 34, suitable for attachment to an actuator, and a forward portion 35 encircled by a spring 36 having one of its ends coupled to that end portion and its opposite end bearing against the flange 14 so as to normally maintain the valve in seated condition. In other words, a flow of air through the passages l6 and nipple I5 is normally precluded.

With the parts positioned in the manner afore noted, it will, of course, be understood that if the nipple I5 is connected by means of a tube 3'! with a source of vacuum, and if an actuator 38 is operated to pull the body 33 rearwardly, such source of vacuum will cause a lowering of the pressure within each of the chambers I2. Due to the fact that the area of the diaphragms 20 is substantially greater than the area of the valve bodies, these diaphragms will be deflected inwardly, resulting in an unseating of the valves. With a continued opening of the control valve portion 33, the valves 24 will now vibrate at acoustical frequencies incident to the inrush of air through the trumpet portions 5 and 6, through the openings H, passages I6, tube I3, and nipple l5. .As has been shown, the trumpet portions are preferably of dififerent lengths so that they will have different natural frequencies, and with this in mind, tension exerted upon the'two valves or disk assemblies is proportioned so that the latter will tend to vibrate at frequencies harthey may also be manufactured by quantity' production methods, and the assembly offers no serious complications. vious that a satisfactory warning signal may be produced to sell at an extremely nominal figure Without, however, sacrificing any of the characteristics which should be embodied in a warning signal. 1

In conclusion it will be appreciated that While, for the sake of economy, it is preferred to produce a warning signal in the manner afore outlined, it is not necessary to resort b9 (1 caste Each of the caps II prefer- Therefore, it will be obing operations. Additionally, a unit of this nature might embody any desired number of sounding assemblies instead of the double assembly which has been illustrated. However, again for most purposes, it is preferred to employ a double rather than a single assembly, and it is found that the addition of such assemblies does not add materially to, the effectiveness of the warning signal. 7

Thus, among others, the several objects of the invention as specifically afore noted are achieved.

It will be understood, however, that numerous changes in construction and rearrangement of the parts might be resorted to without departing from the spirit of the invention as defined by the appended claims.

Having thus described the invention, what is claimed is:

1. A sounding device including a casing, a partition member integral therewith, .a tube also integral with said casing, said tube being formed with openings through its side walls, one of said openings extending through said partition member, a valve disposed within said tube and controlling the flow of air through said openings, and a disk mov'ably associated with said partition member and to vibrate at acoustical frequencies.

2. A sounding device including, in combination, a casing, a pair of partition members disposed within said casing, each of said partition members being formed with an opening, a tube disposed substantially intermediate the partition members and integral'with the latter and said casing, said tube being formed with a plurality of openings, two of which extend respectively through'the partition members and to the casing space to the rear thereof, a valve disposed within said tube and controlling the flow of air through said openings, disks associated one with each of the first named partition openings, and means responsive to the flow of air through said openings for vibrating said disks at acoustical frequencies. a

3. A sounding device including, in combination, a casing, a pair of partition members disposed within said casing, each of said partition members being formed with an opening, a tube disposed substantially intermediate the' partition members and integral with the latter and said casing, said tube being formed with a plurality of openings, two -of which extend respectively through the partition members and through the casing space to the rear thereof ,a' valve disposed within said tube andcontrolling the flow of air through said openings, disks associated one with each of the first named partition openings, means responsive to the flow of air through said openings "for vibrating said disks at acoustical frequencies, and boss elements also forming integral parts of said casing and disposed in line with the peripheral portion of said partition members, said boss members accommodating securing elements to attach parts'to said casing.

4. A sounding device including a casing, a partition vmember integral therewith, a tube also integral with said casing, said tube being formed with openings through its side walls, one of said openings communicating with the space to the rear of said partition member, said member being also" formed with an opening,a valve disposed within said tube to permit of a flow of fluid through its body from one of its openings to the other of the same, a diaphragm to the rear of said partition member, a valve beyond said partition member and to control the flow of fluid within said base for causing sound Waves to be projected by said trumpet portions, said. tube being in communication with a sourceof suction and being formed with openings communicating with said base whereby when said control member is moved within said tube the means within said base will be caused to vibrate.

JOHN M. AUFIERO. 

